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<!DOCTYPE html><html lang="en-US"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,height=device-height,initial-scale=1.0"><meta name="apple-mobile-web-app-capable" content="yes"><meta http-equiv="X-UA-Compatible" content="ie=edge"><meta property="og:type" content="website"><meta name="twitter:card" content="summary"><style>@media screen{body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button,body[data-bespoke-view=next] .bespoke-marp-parent>.bespoke-marp-osc>button,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container button{appearance:none;background-color:initial;border:0;color:inherit;cursor:pointer;font-size:inherit;opacity:.8;outline:none;padding:0;transition:opacity .2s linear;-webkit-tap-highlight-color:transparent}body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button:disabled,body[data-bespoke-view=next] .bespoke-marp-parent>.bespoke-marp-osc>button:disabled,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button:disabled,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container button:disabled{cursor:not-allowed;opacity:.15!important}body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button:hover,body[data-bespoke-view=next] .bespoke-marp-parent>.bespoke-marp-osc>button:hover,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button:hover,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container button:hover{opacity:1}body[data-bespoke-view=""] .bespoke-marp-parent>.bespoke-marp-osc>button:hover:active,body[data-bespoke-view=next] 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40px);margin:20px;overflow:auto;padding-right:3px;white-space:pre-wrap;width:calc(100% - 40px);word-wrap:break-word;scrollbar-color:#eeeeee80 #0000;scrollbar-width:thin}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note::-webkit-scrollbar{width:6px}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note::-webkit-scrollbar-track{background:#0000}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note::-webkit-scrollbar-thumb{background:#eeeeee80;border-radius:6px}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note:empty{pointer-events:none}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note.active{display:block}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note p:first-child{margin-top:0}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-note-container .bespoke-marp-note p:last-child{margin-bottom:0}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container{align-items:center;box-sizing:border-box;color:#eee;display:flex;flex-wrap:nowrap;grid-area:info;justify-content:center;overflow:hidden;padding:0 10px}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-page,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-time,body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-timer{box-sizing:border-box;display:block;padding:0 10px;white-space:nowrap;width:100%}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container button{height:1.5em;line-height:1.5em;width:1.5em}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-page{order:2;text-align:center}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-page .bespoke-marp-presenter-info-page-text{display:inline-block;min-width:120px;text-align:center}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-time{color:#999;order:1;text-align:left}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-timer{color:#999;order:3;text-align:right}body[data-bespoke-view=presenter] .bespoke-marp-presenter-container .bespoke-marp-presenter-info-container .bespoke-marp-presenter-info-timer:hover{cursor:pointer}}@media print{.bespoke-marp-presenter-info-container,.bespoke-marp-presenter-next-container,.bespoke-marp-presenter-note-container{display:none}}</style><style>@charset "UTF-8";@import "https://fonts.bunny.net/css?family=Lato:400,900|Roboto+Mono:400,700&display=swap";div#\:\$p > svg > foreignObject > section{width:1280px;height:720px;box-sizing:border-box;overflow:hidden;position:relative;scroll-snap-align:center center;-webkit-text-size-adjust:100%;text-size-adjust:100%}div#\:\$p > svg > foreignObject > section::after{bottom:0;content:attr(data-marpit-pagination);padding:inherit;pointer-events:none;position:absolute;right:0}div#\:\$p > svg > foreignObject > section:not([data-marpit-pagination])::after{display:none}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1){font-size:2em;margin-block:0.67em}div#\:\$p > svg > foreignObject > section video::-webkit-media-controls{will-change:transform}@page {size:1280px 720px;margin:0}@media print{html, body{background-color:#fff;margin:0;page-break-inside:avoid;break-inside:avoid-page}div#\:\$p > svg > foreignObject > section{page-break-before:always;break-before:page}div#\:\$p > svg > foreignObject > section, div#\:\$p > svg > foreignObject > section *{-webkit-print-color-adjust:exact!important;animation-delay:0s!important;animation-duration:0s!important;color-adjust:exact!important;print-color-adjust:exact!important;transition:none!important}div#\:\$p > svg[data-marpit-svg]{display:block;height:100vh;width:100vw}}div#\:\$p > svg > foreignObject > :where(section){container-type:size}div#\:\$p > svg > foreignObject > section img[data-marp-twemoji]{background:transparent;height:1em;margin:0 .05em 0 .1em;vertical-align:-.1em;width:1em}/*!
* Marp / Marpit Gaia theme.
*
* @theme gaia
* @author Yuki Hattori
*
* @auto-scaling true
* @size 16:9 1280px 720px
* @size 4:3 960px 720px
*/div#\:\$p > svg > foreignObject > section :is(pre, marp-pre) code.hljs{display:block;overflow-x:auto;padding:1em}div#\:\$p > svg > foreignObject > section code.hljs{padding:3px 5px}div#\:\$p > svg > foreignObject > section .hljs{background:#000;color:#f8f8f8}div#\:\$p > svg > foreignObject > section .hljs-comment,div#\:\$p > svg > foreignObject > section .hljs-quote{color:#aeaeae;font-style:italic}div#\:\$p > svg > foreignObject > section .hljs-keyword,div#\:\$p > svg > foreignObject > section .hljs-selector-tag,div#\:\$p > svg > foreignObject > section .hljs-type{color:#e28964}div#\:\$p > svg > foreignObject > section .hljs-string{color:#65b042}div#\:\$p > svg > foreignObject > section .hljs-subst{color:#daefa3}div#\:\$p > svg > foreignObject > section .hljs-link,div#\:\$p > svg > foreignObject > section .hljs-regexp{color:#e9c062}div#\:\$p > svg > foreignObject > section .hljs-name,div#\:\$p > svg > foreignObject > section .hljs-section,div#\:\$p > svg > foreignObject > section 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marp-h3) strong,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4) strong,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5) strong,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6) strong{font-weight:inherit}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h2, marp-h2)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h3, marp-h3)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h4, marp-h4)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h5, marp-h5)::part(auto-scaling),div#\:\$p > svg > foreignObject > section :is(h6, marp-h6)::part(auto-scaling){max-height:580px}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1){font-size:1.8em}div#\:\$p > svg > foreignObject > section :is(h2, marp-h2){font-size:1.5em}div#\:\$p > svg > foreignObject > section :is(h3, marp-h3){font-size:1.3em}div#\:\$p > svg > foreignObject > section :is(h4, 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section footer,div#\:\$p > svg > foreignObject > section header,div#\:\$p > svg > foreignObject > section:after{box-sizing:border-box;font-size:66%;height:70px;line-height:50px;overflow:hidden;padding:10px 25px;position:absolute}div#\:\$p > svg > foreignObject > section:after{--marpit-root-font-size:66%;}div#\:\$p > svg > foreignObject > section header{top:0}div#\:\$p > svg > foreignObject > section footer,div#\:\$p > svg > foreignObject > section header{left:0;right:0}div#\:\$p > svg > foreignObject > section footer{bottom:0}div#\:\$p > svg > foreignObject > section{background-color:var(--color-background);background-image:linear-gradient(135deg, hsla(0,0%,53%,0), hsla(0,0%,53%,.02) 50%, hsla(0,0%,100%,0) 0, hsla(0,0%,100%,.05));color:var(--color-foreground);font-family:Lato,Avenir Next,Avenir,Trebuchet MS,Segoe UI,sans-serif;font-size:35px;height:720px;letter-spacing:1.25px;line-height:1.35;padding:70px;width:1280px;word-wrap:break-word;--color-background:#fff8e1;--color-background-stripe:rgba(69,90,100,.1);--color-foreground:#455a64;--color-dimmed:#6a7a7d;--color-highlight:#0288d1;}div#\:\$p > svg > foreignObject > section{--marpit-root-font-size:35px;}div#\:\$p > svg > foreignObject > section:after{bottom:0;font-size:80%;right:0}div#\:\$p > svg > foreignObject > section:after{--marpit-root-font-size:80%;}div#\:\$p > svg > foreignObject > section a,div#\:\$p > svg > foreignObject > section mark{color:var(--color-highlight)}div#\:\$p > svg > foreignObject > section code{background:var(--color-dimmed);color:var(--color-background)}div#\:\$p > svg > foreignObject > section :is(h1, marp-h1) strong,div#\:\$p > svg > foreignObject > section :is(h2, marp-h2) strong,div#\:\$p > svg > foreignObject > section :is(h3, marp-h3) strong,div#\:\$p > svg > foreignObject > section :is(h4, marp-h4) strong,div#\:\$p > svg > foreignObject > section :is(h5, marp-h5) strong,div#\:\$p > svg > foreignObject > section :is(h6, marp-h6) strong{color:var(--color-highlight)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre){background:var(--color-foreground)}div#\:\$p > svg > foreignObject > section :is(pre, marp-pre)>code{background:transparent}div#\:\$p > svg > foreignObject > section blockquote:after,div#\:\$p > svg > foreignObject > section blockquote:before,div#\:\$p > svg > foreignObject > section footer,div#\:\$p > svg > foreignObject > section header,div#\:\$p > svg > foreignObject > section section:after{color:var(--color-dimmed)}div#\:\$p > svg > foreignObject > section table td,div#\:\$p > svg > foreignObject > section table th{border-color:var(--color-foreground)}div#\:\$p > svg > foreignObject > section table thead th{background:var(--color-foreground);color:var(--color-background)}div#\:\$p > svg > foreignObject > section table tbody>tr:nth-child(odd) td,div#\:\$p > svg > foreignObject > section table tbody>tr:nth-child(odd) th{background:var(--color-background-stripe, transparent)}div#\:\$p > svg > foreignObject > section>:first-child,div#\:\$p > svg > foreignObject > section>header:first-child+*{margin-top:0}div#\:\$p > svg > foreignObject > section:where(.invert){--color-background:#455a64;--color-background-stripe:rgba(255,248,225,.1);--color-foreground:#fff8e1;--color-dimmed:#dad8c8;--color-highlight:#81d4fa;}div#\:\$p > svg > foreignObject > section:where(.gaia){--color-background:#0288d1;--color-background-stripe:rgba(255,248,225,.1);--color-foreground:#fff8e1;--color-dimmed:#cce2de;--color-highlight:#81d4fa;}div#\:\$p > svg > foreignObject > section:where(.lead){align-items:stretch;flex-flow:column nowrap;place-content:safe center center}div#\:\$p > svg > foreignObject > section:where(.lead) :is(h1, marp-h1),div#\:\$p > svg > foreignObject > section:where(.lead) :is(h2, marp-h2),div#\:\$p > svg > foreignObject > section:where(.lead) 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foreignObject > section:where(.lead) ul>li>p{text-align:left}div#\:\$p > svg > foreignObject > section:where(.lead) table{margin-left:auto;margin-right:auto}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"]{columns:initial!important;display:block!important;padding:0!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"]::before, div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"]::after, div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="content"]::before, div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="content"]::after{display:none!important}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container]{all:initial;display:flex;flex-direction:row;height:100%;overflow:hidden;width:100%}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container][data-marpit-advanced-background-direction="vertical"]{flex-direction:column}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"][data-marpit-advanced-background-split] > div[data-marpit-advanced-background-container]{width:var(--marpit-advanced-background-split, 50%)}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"][data-marpit-advanced-background-split="right"] > div[data-marpit-advanced-background-container]{margin-left:calc(100% - var(--marpit-advanced-background-split, 50%))}div#\:\$p > svg > foreignObject > section[data-marpit-advanced-background="background"] > div[data-marpit-advanced-background-container] > figure{all:initial;background-position:center;background-repeat:no-repeat;background-size:cover;flex:auto;margin:0}div#\:\$p > svg > foreignObject > 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</style></head><body><div class="bespoke-marp-osc"><button data-bespoke-marp-osc="prev" tabindex="-1" title="Previous slide">Previous slide</button><span data-bespoke-marp-osc="page"></span><button data-bespoke-marp-osc="next" tabindex="-1" title="Next slide">Next slide</button><button data-bespoke-marp-osc="fullscreen" tabindex="-1" title="Toggle fullscreen (f)">Toggle fullscreen</button><button data-bespoke-marp-osc="presenter" tabindex="-1" title="Open presenter view (p)">Open presenter view</button></div><div id=":$p"><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section data-paginate="true" data-background-color="#000" data-color="#fff" data-footer="Node.js Global Summit 2025" data-theme="gaia" lang="en-US" data-marpit-pagination="1" style="--paginate:true;--background-color:#000;--color:#fff;--footer:Node.js Global Summit 2025;--theme:gaia;color:#fff;background-color:#000;background-image:none;--marpit-advanced-background-split:30%;" data-marpit-pagination-total="19" data-marpit-advanced-background="background" data-marpit-advanced-background-split="left"><div data-marpit-advanced-background-container="true" data-marpit-advanced-background-direction="horizontal"><figure style="background-image:url("poster.png");background-size:70%;"></figure></div></section></foreignObject><foreignObject width="70%" height="720" x="30%"><section id="1" data-paginate="true" data-background-color="#000" data-color="#fff" data-footer="Node.js Global Summit 2025" data-theme="gaia" lang="en-US" data-marpit-pagination="1" style="--paginate:true;--background-color:#000;--color:#fff;--footer:Node.js Global Summit 2025;--theme:gaia;color:#fff;background-color:#000;background-image:none;--marpit-advanced-background-split:30%;" data-marpit-pagination-total="19" data-marpit-advanced-background="content" data-marpit-advanced-background-split="left">
<h1 id="next-gen-microservice-gateways-real-time-forwarding-with-bun"><strong>Next-Gen Microservice Gateways: Real-Time Forwarding with Bun</strong></h1>
<p>Seyyed Ali Mohammadiyeh (Max Base)<br />
Node.js Global Summit 25 - May 20, 2025</p>
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<h1 id="about-me"><strong>About Me</strong></h1>
<p><strong>Seyyed Ali Mohammadiyeh (Max Base)</strong><br />
Open-source Maintainer, GitHub<br />
Senior Software Engineer<br />
CTO, asrez<br />
<img class="emoji" draggable="false" alt="📧" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/1f4e7.svg" data-marp-twemoji=""/> <a href="mailto:maxbasecode@gmail.com">maxbasecode@gmail.com</a></p>
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<h1 id="experience"><strong>Experience</strong></h1>
<ul>
<li><img class="emoji" draggable="false" alt="👨💻" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/1f468-200d-1f4bb.svg" data-marp-twemoji=""/> GitHub: <a href="https://github.com/basemax">https://github.com/basemax</a></li>
<li><img class="emoji" draggable="false" alt="🧠" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/1f9e0.svg" data-marp-twemoji=""/> 10+ years of experience in software development</li>
<li><img class="emoji" draggable="false" alt="🎓" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/1f393.svg" data-marp-twemoji=""/> Background in pure and applied mathematics with research experience</li>
</ul>
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</section>
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<h1 id="session-overview"><strong>Session Overview</strong></h1>
<p>Explore how <strong>Bun</strong> and <strong>TypeScript</strong> enable the creation of a high-performance, real-time gateway that routes incoming HTTP requests to the appropriate microservices.</p>
<ul>
<li>Why traditional reverse proxies (like NGINX or Express) fall short in dynamic routing scenarios.</li>
<li>How Bun offers minimal latency, simplified logic, and better scalability.</li>
</ul>
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<h2 id="this-talk-includes">This talk includes:</h2>
<p><img class="emoji" draggable="false" alt="✅" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/2705.svg" data-marp-twemoji=""/> Real-world architecture & benchmarks<br />
<img class="emoji" draggable="false" alt="✅" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/2705.svg" data-marp-twemoji=""/> Code examples<br />
<img class="emoji" draggable="false" alt="✅" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/2705.svg" data-marp-twemoji=""/> Lessons from production</p>
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</section>
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<h1 id="goals-of-this-talk"><strong>Goals of This Talk</strong></h1>
<ol>
<li>Learn to build a real-time microservice gateway using <strong>Bun + TypeScript</strong></li>
<li>Discover how <strong>Bun</strong> can outperform Express/NGINX in dynamic routing</li>
<li>Understand live request forwarding with minimal latency</li>
</ol>
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</section>
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<h1 id="getting-started-with-bun"><strong>Getting Started with Bun</strong></h1>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-bash">$ bun init
✓ Select a project template: Blank
+ .gitignore
+ index.ts
+ tsconfig.json (<span class="hljs-keyword">for</span> editor autocomplete)
To get started, run:
bun run index.ts
</code></pre>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-ts"><span class="hljs-comment">// index.ts</span>
<span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(<span class="hljs-string">"Hello via Bun!"</span>);
</code></pre>
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<h1 id="running-your-first-bun-program">Running your first Bun program</h1>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-bash">$ bun run index.ts
Hello via Bun!
</code></pre>
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<h1 id="why-bun"><strong>Why Bun?</strong></h1>
<p><img class="emoji" draggable="false" alt="✅" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/2705.svg" data-marp-twemoji=""/> Native HTTP server (no need for Express or external frameworks)<br />
<img class="emoji" draggable="false" alt="✅" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/2705.svg" data-marp-twemoji=""/> Written in TypeScript<br />
<img class="emoji" draggable="false" alt="✅" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/2705.svg" data-marp-twemoji=""/> Built-in routing based on URL, headers, or tokens<br />
<img class="emoji" draggable="false" alt="✅" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/2705.svg" data-marp-twemoji=""/> Blazing fast<br />
<img class="emoji" draggable="false" alt="✅" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/2705.svg" data-marp-twemoji=""/> Zero dependencies</p>
<p><strong>Downsides</strong>:<br />
<img class="emoji" draggable="false" alt="⚠️" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/26a0.svg" data-marp-twemoji=""/> Type checking and runtime validation in TypeScript is still maturing.<br />
<img class="emoji" draggable="false" alt="⚠️" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/26a0.svg" data-marp-twemoji=""/> Limited ecosystem maturity compared to Node.js</p>
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<h1 id="using-bunserve"><strong>Using Bun.serve()</strong></h1>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-ts"><span class="hljs-keyword">const</span> server = <span class="hljs-title class_">Bun</span>.<span class="hljs-title function_">serve</span>({
<span class="hljs-attr">port</span>: <span class="hljs-number">9999</span>,
<span class="hljs-title function_">fetch</span>(<span class="hljs-params">req</span>) {
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">Response</span>(<span class="hljs-string">"Not Found"</span>, { <span class="hljs-attr">status</span>: <span class="hljs-number">404</span> });
},
});
</code></pre>
<ul>
<li>Every incoming request triggers the <code>fetch()</code> function.</li>
<li>You can access request details through the <code>req</code> object.</li>
</ul>
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<h1 id="accessing-request-details"><strong>Accessing Request Details</strong></h1>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-ts"><span class="hljs-keyword">const</span> server = <span class="hljs-title class_">Bun</span>.<span class="hljs-title function_">serve</span>({
<span class="hljs-attr">port</span>: <span class="hljs-number">9999</span>,
<span class="hljs-title function_">fetch</span>(<span class="hljs-params">req</span>) {
<span class="hljs-keyword">const</span> url = <span class="hljs-keyword">new</span> <span class="hljs-title function_">URL</span>(req.<span class="hljs-property">url</span>);
<span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(url);
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">Response</span>(<span class="hljs-string">"Not Found"</span>, { <span class="hljs-attr">status</span>: <span class="hljs-number">404</span> });
},
});
</code></pre>
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<p>Example <code>req</code> (request) object:</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-ts"><span class="hljs-title class_">Request</span> {
<span class="hljs-attr">method</span>: <span class="hljs-string">"GET"</span>,
<span class="hljs-attr">url</span>: <span class="hljs-string">"http://localhost:9999/"</span>,
<span class="hljs-attr">headers</span>: <span class="hljs-title class_">Headers</span> {
<span class="hljs-string">"host"</span>: <span class="hljs-string">"localhost:9999"</span>,
<span class="hljs-string">"user-agent"</span>: <span class="hljs-string">"..."</span>,
...
}
}
</code></pre>
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<p>Key values to use:</p>
<ul>
<li><code>req.method</code></li>
<li><code>req.url</code></li>
<li><code>req.headers</code></li>
</ul>
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<h1 id="parsed-url-object"><strong>Parsed URL Object</strong></h1>
<p>Output of <code>new URL(req.url)</code>:</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-ts"><span class="hljs-variable constant_">URL</span> {
<span class="hljs-attr">href</span>: <span class="hljs-string">"http://localhost:9999/favicon.ico"</span>,
<span class="hljs-attr">origin</span>: <span class="hljs-string">"http://localhost:9999"</span>,
<span class="hljs-attr">pathname</span>: <span class="hljs-string">"/favicon.ico"</span>,
<span class="hljs-attr">searchParams</span>: <span class="hljs-title class_">URLSearchParams</span> {}
}
</code></pre>
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<h2 id="lets-create-a-microservice-gateway">Let's Create a Microservice Gateway</h2>
<p>Imagine we are working on a large-scale project with over 800 RESTful API routes.</p>
<p>From an architectural perspective, we can split the entire platform into 20 sub-projects.</p>
<p>Each of these 20 sub-projects runs independently and serves on a different HTTP port.</p>
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<h2 id="lets-create-a-microservice-gateway-1">Let's Create a Microservice Gateway</h2>
<p>Now, we need a central gateway — a program that initially receives all incoming requests from end users. It should analyze each request to determine which sub-project or microservice it belongs to and then forward the request accordingly.</p>
<p>The gateway must not only forward the request to the appropriate sub-project but also handle the response by forwarding it back to the user.</p>
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<h2 id="lets-create-a-config-structure">Let's create a config structure</h2>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code class="language-json"><span class="hljs-punctuation">{</span>
<span class="hljs-attr">"host"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"0.0.0.0"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"port"</span><span class="hljs-punctuation">:</span> <span class="hljs-number">9999</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"services"</span><span class="hljs-punctuation">:</span> <span class="hljs-punctuation">[</span>
<span class="hljs-punctuation">{</span>
<span class="hljs-attr">"prefix"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"/user/"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"host"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"localhost"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"port"</span><span class="hljs-punctuation">:</span> <span class="hljs-number">8888</span>
<span class="hljs-punctuation">}</span><span class="hljs-punctuation">,</span>
<span class="hljs-punctuation">{</span>
<span class="hljs-attr">"path"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"/my/login/"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"method"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"POST"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"host"</span><span class="hljs-punctuation">:</span> <span class="hljs-string">"localhost"</span><span class="hljs-punctuation">,</span>
<span class="hljs-attr">"port"</span><span class="hljs-punctuation">:</span> <span class="hljs-number">6666</span>
<span class="hljs-punctuation">}</span><span class="hljs-punctuation">,</span>
...
<span class="hljs-punctuation">]</span>
<span class="hljs-punctuation">}</span>
</code></pre>
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<h1 id="coding">Coding</h1>
<p>Create a new Bun project:</p>
<pre is="marp-pre" data-auto-scaling="downscale-only"><code>bun init
</code></pre>
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<h1 id="wrap-up"><strong>Wrap Up</strong></h1>
<ul>
<li>Bun + TypeScript = high-speed real-time gateways</li>
<li>Ideal for scalable microservices with dynamic routing</li>
<li>Simpler, faster, and more maintainable than traditional tools</li>
</ul>
<p><strong>Thank you!</strong></p>
<p><img class="emoji" draggable="false" alt="🔗" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/1f517.svg" data-marp-twemoji=""/> <a href="https://github.com/basemax">github.com/basemax</a><br />
<img class="emoji" draggable="false" alt="📧" src="https://cdn.jsdelivr.net/gh/jdecked/twemoji@16.0.1/assets/svg/1f4e7.svg" data-marp-twemoji=""/> <a href="mailto:maxbasecode@gmail.com">maxbasecode@gmail.com</a></p>
<footer>Node.js Global Summit 2025</footer>
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